Introduction

Reference :

http://linux-ip.net/html/index.html

http://www.iptables.info/en/iptables-contents.html

Try to tell linux and network ... and all Linux Network tool (command)

This file file serves as your book's preface, a great place to describe your book's content and ideas.

ACL (Access Control List)

• It's a table that tells a computer operating system which access rights each user has to a particular system object, such as a file directory or individual file. Each object has a security attribute that identifies its access control list. The list has an entry for each system user with access privileges. The most common privileges include the ability to read a file, to write to the file or files, and to execute the file.